(±) The average temperature for the upper side under maximal load is 37.1 °C / 99 F, compared to the average of 33 °C / 91 F for the devices in the class Smartphone.(+) The maximum temperature on the upper side is 38.9 °C / 102 F, compared to the average of 35.5 °C / 96 F, ranging from 22.4 to 51.7 °C for the class Smartphone.(±) The bottom heats up to a maximum of 42.8 °C / 109 F, compared to the average of 34.1 °C / 93 F(+) In idle usage, the average temperature for the upper side is 30.4 °C / 87 F, compared to the device average of 33 °C / 91 F.